<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.city}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper"
                        v-for="item of hot"
                        :key="item.id"
                        @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area"
                v-for="(item, key) of cities"
                :key="key"
                :ref="key"
                >
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div
                        class="item border-bottom"
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)"
                    >
                    {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState(['city'])
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';
.border-topbottom
    &:before
        border-color #cccccc
    &:after
        border-color #cccccc
.border-bottom
    &:before
        border-color #cccccc
.list
    position absolute
    overflow hidden
    top 1.7rem
    left 0
    right 0
    bottom 0
    .title
        line-height .54rem
        background #eeeeee
        padding-left .2rem
        color #666
        font-size .26rem
    .button-list
        overflow hidden
        padding .1rem .6rem .1rem .1rem
        .button-wrapper
            float left
            width 33.33%
            .button
                margin .1rem
                padding .1rem 0
                text-align center
                border .02rem solid #cccccc
                border-radius .1rem
    .item-list
        .item
            line-height .76rem
            color #666
            padding-left .2rem
</style>
